import { hi } from './m1'
console.log('入口');

function sum(a: number, b: number): number {
   return a + b
}
console.log(hi);

console.log(sum(99, 1));


const obj: { name: string, age?: number } =
{
   name: 'lys'
}

obj.age = 123

console.log(obj);

console.log(Promise);
